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Table 1.

Derived rotational constants for c-C5H4CCH2.

Constant (a) TMC-1 (b) Laboratory (c) Merged fit (d)
A 8180.862(38) 8180.813(24) 8180.855(20)
B 1886.66733(64) 1886.67218(25) 1886.67152(19)
C 1549.11498(74) 1549.11344(26) 1549.11379(17)
ΔJ × 105 3.61(20) 4.46(15) 4.263(70)
ΔJK × 103 3.007(70) 3.0085(70) 3.0065(77)
δJ × 105 1.07(19) 0.602(60)

Nlines (e) 30 97 127
rms (f) 19 34 31
Jmax (g) 15 11 15
Ka, max (g) 3 10 10
νmax (h) 48 420.601 39 354.900 48 420.601



Fitted rotational and distortion constants. The values in brackets correspond to the uncertainties of the parameters in units of the last significant digits.


Fit to the line frequencies observed in TMC-1 alone.


Fit to the laboratory data (see text).


Merged fit to the laboratory and TMC-1 data (see Table C.1).


Number of lines in the fit.


The standard deviation of the fit in kHz.


Maximum value of J and Ka of the lines included in the fit.


Maximum frequency of the lines included in the fit in MHz.

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